Automatic cut-off valve for gas-burners.



F. J. MADDEN.

AUTOMATIC GUT-OFF VALVE FOR GAS BURNERS.

APPLICATION FILED 001.2, 1911.

1,035,208. Patented Aug. 13, 1912.

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1?. J. MADDEN.

AUTOMATIC GUT-OFF VALVE FOR GA$ BURNERS.

APPLICATION FILED 00T.2, 1911.

1,035,208, Patented Aug. 13, 1912.

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. UNITED warm FRANK J. MADDEN, or ALBERT LEA, mnnnso'ra, assrenon or ONEQHALF TO OLIVER K. EARLE, or MINNEAPOLIS, MINNESOTA.

AUronA'rIo cur-orr VALVE FOR GAS-BURNERS.

'I Specification of Letters ZPatent.

1 Patented Aug. 13,1912.

Application filed flc tober 2:, i911. Serial No. 652,245.

To all whom it may concern:

Be it known that I, FRANK J. MADbEN,

(whose post-oflice addressris Albert Lea,

Minnesota,) a citizen of thelUnited: States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and.-usefulfImprove-j ments in Automatic CutOfl Valves for Gas-Burners; and I do'hereby declare the following to be a full, clear,:'and'exact"description of the invention, such as fwillenable others skilled in the arttto which it I tached. The other end of said tube 5 is appertains to make and use the same.

My invention relates to-burners for gas stoves and has for its object the provision of simple and highly eflicient means .whereby a relatively large flame will be burned only I when there is a utensil or other article in position over the burner, and which, when said utensil or other article is removed, will 1 cut down the flame to-a mlnimumzor to a; size of flame only suificient to serve'as a;

lighter for the main burner.

what may be designated as a high-low burner, which adjusts the flame for the showing a gas burner with my improved automatic releaser' or adjustment applied thereto; Fig. 2 is'a side elevation of -the parts shown in Fig. 1, some parts being shown diagrammatically by broken lines; Fig. 3 is a detail in transverse section taken on the line m m of Fig. 1; and, Fig. 4 is a detail in vertical section taken on the line as m of Fig. 1, some parts being broken away.

The numeral 1 indicates a gas burner of standard or ordinary construction such as is generally applied to gas stoves. In Fig. 2; a portion of the top of a gas stove to which the burner 1 is attachedis indicated by the numeral 2, and in Figs. 1 and 2, the spiderlike griddle over-lies the burner and is loosely set for vertical movements in a suit applied a gas burner of standard or ordinary-construction. In the application of this attachment, a short sleeve 4, the inner end =of-which serves as a valve seat, is screwed into the outer end of the tubular stem of the burner 1. The intermediate por tion of a transversely extended tube 5 is connected to the outer end of the'sleeve 4, preferably by threaded engagement there with. One end of the tube 5 is connected to a receiving nipple 6 to which a gas supply pipe, not'lshown, is adapted to be atconnected to a small gas tube 7, the end of which iterminates close to one side of the burner 1 in position where it is adapted to serveas a pilot burner or lighterfor the I 7 tube 5, and axially alined with the coupling Otherwise stated, he invention provides sleeve 4, is a guide sleeve 9, and screwed to the outer end of this guide sleeve 9 is a cap 10 provided with a stuffing box 11 at its outer end. The stem of a long needle valve 12 works through the stufling box 11, through the cap 10 and through the sleeve 9, and its conical inner end normally closes the passage through the coupling sleeve 4 and thereby normally cuts off the supply of gas to the main burner 1.

-- iAsleeve-like stop 13 is screw-threaded on the intermediate portion of the needle valve 12. This stop sleeve 13 is mounted, with freedom for endwise adjustments but is held against rotation, as shown, by one ,or more screws 14 screwed through the outer sleeve 9 with their inner ends working in grooves 15 of the said stop sleeve 13. The outer end of the stop sleeve 13 is engageable with the cap 10 to limit the opening movement of the needle valve 12; and, as is evident, the position into which said needle valve will be moved away from its seat in the sleeve 4 will depend upon the distance which the said stop sleeve 13 is normally set from the said capilO. Hence, byadjustment of the said stop sleeve 13, the amount of gas that will be supplied to the main burner when the needle valve is moved into its open position. may be regulated at will.

For automatically opening the needle valve, or the valve employed to control the supply of gas to the inain burner, l providel connections preferably arrangedias follows The numeral "16 indicates; ajbent. arm,ft lije1" lower end of which is'rigidly secured'to a" collar 17 pivotally I I mounted on {the transverse tube 5, between collars 18 and 19 fixed on saidtube, .llheifreeppper .end of the arm'16 engages 'and supports one edge of the so-called griddle *3. Thenumeral Q10 indicates a valve actuating bar provided with two longitudinally extendedl slots K21 and: 22,:(3116 "former :of which I embraces" the tube 5 between'the collars: 17 and 19,:andstl1e :latter =f which embraces :a retaining screw '23, shownias secured to theoap 1'0. The

outer end of this barf 20. islatera'lly bent and forked :and engages van annular groove 24 .formed 1n the hub of 311- 21d]l1StlIlgf lm0b 125 secured to'theextreme outer end of-thenee- 'dle -valve 12. "A coiled springz26attachd to thezinner end of the sliding bar and, as shown, to an anhoringpinfl'? on the=burner '1, yieldingly'throws thezsaid bar 20 inward and normally holds the needle 'valve112 i set in the sleeve 4; The-collar or1hub"1'7 oflthe arms 16 is: provided with a radiallyiproj ecting pin or shoulder: 281th at engages with a la'teral proj ection :29 on tl1e+-sliding bar 20,

4 and 'thusnormallycauseswtli'espring QGi-to holdup the-arm 16 and "the griddle 3, 21? indiCatedYin'Fig'Q.

- W'hena'kettle or other cooking utensil-or 'any other articlesuch, forinstance,-as an iron, is placed on'the griddle 3,-its weight will-'be sufiicient to press the-arm 16 downward against the tension of thespring 26, and thereby imove' the sliding bar 20 'rear .ward, causing the latter'to move the needle valve into an open position. As already'indicated, the extent to :which'the said needle valve 'willbe =moved "to :"an open position is I 1. The 'co nb'na-tion vwith a gas 'burner and avertically inovable griddlej ofa gas supply connection to saidburner, ,a valve f'for controllingithe supply or gas fromsai'd connectio'n'to'said burner, a fixed stop and a cotiperatinmiadjustable. stop movable with said valve for varying the opening movement of said valve, yielding means tending to close said valve, and a connect-ionfor opening '-said Waive actuated by depression "of said griddle.

2. The combinationiwithsargasiburner.and a vertically movable .gri'ddle, of a'eo'n'duit, a .gas supply connection. frorn-said conduit .lea ding to saidi burner,:a: yieldin'glyx pressed endwise emo'uable valve nnormally giolosing said conduit, ran adjustable-3 stop ion srsaid valve icooperatingmvith ea, relatively ufixed stop :el'ement tollimit the movements of: said :valve, -.a-slide mov ableendWismwithat-lie-said valve which permits adjustments ofothe: latter, a: pivoted) arm: o'perativesson saidnslidei to move .flre 'samerand'asaid waive; endwisepthe free end of :said warm; normallyerengagilig said-:g'riddlewan'dxa spring operativei onlvthe ssaid parts :toinormallyholdzsafil valve closed andssaidFarm:andsgriildleiupflitfited substanr tiallyvasdescribed: :ci'e-r r:

. 3.".flhe combinationvwith a gasbunnemand a -vertically1 movable zgriddle; oi's'gasvsizpply connectionssincludin'g :a-couplinga sleeve con: nected to said burneriandl atzt-ransverse'itube intermediately :connected' lto saidisleevm-iia guide sleeve connected-i-torisaiil wtransvers'e tube and alined with: said couplingzsleeate, a needle "valve movableendwiserthroughi said guide sleeve rand normally closing .themont duit through said coupling rsleeve, a a- :stop sleeve having rithreaded engagement with said needle \valve 2 and a movable rendwise rifi said guiding sleeve butzrheld zagainst'irota- 4,

valve butpermitting: rotation .of the \lattue'r, i

am arm: pivotedon said atransverse .talbeawith its free end: inormallyvengagingvanil uplift: ing @saids riddlea andi a Zspriing IOPI'fli-liVB, on said slide rand .normally holding :saidw needle griddle uplifted, 'subst-a-ntiallyi as 1 described. In testimony whereof I aflix my signature in presence-of two witnesses';

TWitnesses:

' JoHN-iFuD. MEIGHEN, L1vER- :GoRDEN.' V

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